Add backfill benchmarks #2088

Job	Run time
dead code check	10s
benchmark (pg: 14.8)	2m 36s
examples (pg: 14.8, schema: public)	32s
benchmark (pg: 15.3)	2m 23s
examples (pg: 14.8, schema: non_public)	35s
benchmark (pg: 16.4)	2m 27s
validate examples JSON	20s
benchmark (pg: 17.0)	2m 46s
examples (pg: 15.3, schema: public)	43s
benchmark (pg: latest)	2m 47s
examples (pg: 15.3, schema: non_public)	41s
license check	6s
examples (pg: 16.4, schema: public)	40s
lint	22s
examples (pg: 16.4, schema: non_public)	44s
test (pg: 14.8, schema: public)	1m 0s
examples (pg: 17.0, schema: public)	43s
test (pg: 14.8, schema: non_public)	54s
examples (pg: 17.0, schema: non_public)	40s
type generation	8s
test (pg: 15.3, schema: public)	54s
examples (pg: latest, schema: public)	48s
test (pg: 15.3, schema: non_public)	46s
examples (pg: latest, schema: non_public)	47s
test (pg: 16.4, schema: public)	55s
test (pg: 16.4, schema: non_public)	54s
test (pg: 17.0, schema: public)	1m 4s
test (pg: 17.0, schema: non_public)	50s
test (pg: latest, schema: public)	1m 3s
test (pg: latest, schema: non_public)	54s
release	0s
	30m 12s

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